Lakso

Depends on where you are! In some places it is more common to say that 0 is natural and in other’s not. Some argue it’s useful to have it N, some, say that it makes more historical and logical sense for 0 not to be in N and use N_0 when including it. It’s not a settled issue, it’s a matter of perspective.

When you study CompSci (depending on where IG) you tend to see them that way when trying to mathematically prove something about an algorithm. It’s only really a good way of thinking if you’re into coding, but I don’t think a teacher for a non-coding related algebra class should show this, it can be really confusing for some people.

Lua is just a based language. It has strong unpopular opinions and doesn’t care what you think.